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1, 10, 84, 736, 6576, 59080, 531504, 4783096, 43046976, 387421000, 3486785424, 31381061656, 282429540576, 2541865836520, 22876792471344, 205891132127416, 1853020188917376, 16677181699797640, 150094635297261264
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OFFSET
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0,2
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LINKS
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Table of n, a(n) for n=0..18.
Index entries for linear recurrences with constant coefficients, signature (12,-29,18).
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FORMULA
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G.f.: 1/(1-9*x)+1/(1-2*x)-1/(1-x). E.g.f.: e^(9*x)+e^(2*x)-e^x.
a(n)=11*a(n-1)-18*a(n-2)-8 with a(0)=1, a(1)=10 - Vincenzo Librandi, Jul 21 2010
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PROG
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(PARI) a(n)=9^n+2^n-1^n \\ Charles R Greathouse IV, Jun 11 2015
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CROSSREFS
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Cf. A074501, A074600, A005057, A005056, A099393, A155588, A155590, A155592.
Sequence in context: A027310 A287826 A335647 * A239990 A321295 A318793
Adjacent sequences: A155590 A155591 A155592 * A155594 A155595 A155596
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KEYWORD
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nonn,easy
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AUTHOR
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Mohammad K. Azarian, Jan 24 2009
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STATUS
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approved
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